EP2237977A1 - Procédé pour déterminer la profondeur de sculpture d'un pneu de véhicule - Google Patents

Procédé pour déterminer la profondeur de sculpture d'un pneu de véhicule

Info

Publication number
EP2237977A1
EP2237977A1 EP08871872A EP08871872A EP2237977A1 EP 2237977 A1 EP2237977 A1 EP 2237977A1 EP 08871872 A EP08871872 A EP 08871872A EP 08871872 A EP08871872 A EP 08871872A EP 2237977 A1 EP2237977 A1 EP 2237977A1
Authority
EP
European Patent Office
Prior art keywords
tire
vehicle
tread depth
tire tread
vehicle tire
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08871872A
Other languages
German (de)
English (en)
Other versions
EP2237977B1 (fr
Inventor
Thorsten Pannek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2237977A1 publication Critical patent/EP2237977A1/fr
Application granted granted Critical
Publication of EP2237977B1 publication Critical patent/EP2237977B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/24Wear-indicating arrangements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C19/00Tyre parts or constructions not otherwise provided for
    • B60C2019/004Tyre sensors other than for detecting tyre pressure

Definitions

  • the invention is based on a method according to the preamble of claim 1.
  • the document DE 103 04 126 A1 discloses an electronic device for measuring a tire tread depth and a pressure loss of a vehicle tire, wherein a reference value of a traveled distance is compared with the wheel revolutions of an ABS wheel tacho sensor system and wherein due to
  • the inventive method for determining a vehicle tire tread depth according to the independent claims, over the prior art has the advantage that an immediate determination of the tire circumference is made possible in a particularly simple manner with only a single sensor. This is achieved by the sensor measuring both the tire life of the vehicle tire and the tire uptime.
  • the tire rotation period is proportional to the tire circumference, while the tire contact duration is substantially constant even with a change in the tire circumference and / or the change in the tire circumference
  • Tire uptime is less than the change in the tire life cycle, since the tire uptime depends to a first approximation mainly on vehicle weight.
  • the change in the ratio of the tire contact time to the tire cycle duration is thus a measure of the changing tire circumference.
  • the sensor is preferably disposed in a tire portion having a non-zero radius with respect to the tire axis, such that a sensor tire portion indicates a portion of a tire tread that overlaps the sensor in the radial direction of the vehicle tire.
  • the tire contact patch according to the invention comprises a surface of a tire portion having a non-zero radius with respect to the tire axis, such that a sensor tire portion indicates a portion of a tire tread that overlaps the sensor in the radial direction of the vehicle tire.
  • the tire contact patch according to the invention comprises a surface of a
  • the measurement of the tire contact duration and the tire cycle duration takes place, for example, by measuring a force effect on the sensor, wherein the sensor tire portion is located in the tire contact patch in a first time interval, so that essentially the gravitational force acts on the sensor and in a second time interval the sensor tire portion is located outside the tire footprint so that substantially a centrifugal force caused by the rotation of the vehicle tire acts on the sensor.
  • the first time interval thus includes the tire uptime and a sum of the first and second time intervals includes the tire cycle duration.
  • the determination of the first, the second and / or the sum of the first and the second time interval is carried out by measuring time values at times in which the force action on the sensor has a comparatively large change, i. in a transition region from the gravitational force to the centrifugal force or vice versa.
  • the measurement of the tire footprint additionally enables the determination of the state of charge of the vehicle.
  • an average value over many individual determinations of the vehicle tire tread depths is formed to determine the mean vehicle tire tread depth, so that the accuracy of tire tread depth determination is increased in a particularly advantageous manner.
  • averaging over many individual determinations is provided, which are determined by different measuring methods.
  • Vehicle tire tread depth is performed in response to first correction data of a memory, the memory having characteristic curves of the vehicle tire and wherein the characteristics preferably information with respect to the dimensions, rolling properties, rolling radius changes and factory tread depths different types of tires.
  • a correction of the tire tread depth to increase the accuracy of the same allows.
  • the determination or detection of an absolute tire tread depth can be realized, for example a minimum tread depth of 1.6 mm.
  • a changing rolling radius of the vehicle tire is taken into account.
  • the determination of the vehicle tire tread depth is dependent on second correction data of a
  • Tire pressure sensor is performed.
  • the tire contact patch or duration has, in addition to the dependency on the vehicle weight, a comparatively small dependence on the tire pressure, so that taking into account the tire pressure by means of a tire pressure sensor advantageously increases the accuracy of the vehicle tire tread depth determination.
  • the determination of the vehicle tire tread depth is carried out as a function of third correction data, the third correction data comprising differences between the tire life of a plurality of vehicle tires of the vehicle, which occur in particular during the steering operation.
  • the third correction data comprising differences between the tire life of a plurality of vehicle tires of the vehicle, which occur in particular during the steering operation.
  • the determination of the vehicle tire tread depth is carried out as a function of fourth correction data of a traction control system, inclination sensors and / or travel sensors so that an additional correction of the tire tread depth can be advantageously realized to increase the accuracy thereof.
  • the correction data of the inclination sensors make it possible to detect the state of charge of the vehicle, which has a comparatively great influence on the size of the tire contact patch and thus on the profile depth determination.
  • the vehicle tire tread depth is communicated to a vehicle driver, a warning signal is generated when the vehicle tire tread depth falls below a limit value and / or a maximum range of the vehicle is determined by the tire tread depth below the limit value and / or communicated to the vehicle driver.
  • the vehicle driver is particularly advantageously informed about the current tire tread depth of his vehicle, in particular visually and / or acoustically, so that the accident and breakdown risk due to tire damage and / or lack of tire tread depth is considerably reduced. Furthermore, due to the calculation of the remaining maximum range is for the driver early planning of an imminent tire change, especially before longer trips, possible.
  • the vehicle tire tread depth is determined in a central control unit which preferably determines the tire cycle duration, the speed value, the tire contact patch, the mean value, the vehicle tire tread depth, the range, the limit value, the warning signal, the first correction data, the second correction data and / or receives the third correction data inductively and / or electromagnetically.
  • a central control unit which preferably determines the tire cycle duration, the speed value, the tire contact patch, the mean value, the vehicle tire tread depth, the range, the limit value, the warning signal, the first correction data, the second correction data and / or receives the third correction data inductively and / or electromagnetically.
  • Another object of the present invention is a sensor arrangement for determining a vehicle tire tread depth, in particular for performing a method according to one of the preceding claims, wherein the sensor is arranged in or on a vehicle tire and detects the tire contact time of the vehicle tire and wherein the sensor preferably comprises an acceleration sensor.
  • an acceleration sensor mounted in the sensor tire portion of the vehicle tire makes it possible to detect the tire wear period and / or the tire cycle time by the time measurement when relatively large force changes occur the sensor.
  • a significantly higher precision of a vehicle tire tread depth determination is achieved with only a single sensor compared to the prior art.
  • FIG. 1 shows a schematic diagram of a force effect on an acceleration sensor in a method according to an exemplary embodiment of the present invention.
  • FIG. 1 shows a schematic diagram of a force effect on an acceleration sensor in a method according to an exemplary embodiment of the present invention, wherein an acceleration sensor 1 is arranged in a region of a vehicle tire 2 which has a radius 12 greater than zero with respect to a tire axis 11. so that the sensor 1 is located in particular in the area of a tire tread 17.
  • a tire footprint 40 is formed by a contact area between the tire tread 17 and a roadway 18.
  • a sensor tire portion includes a portion of the tire tread 17 that overlaps the sensor 1 substantially in a radial direction parallel to the radius 12.
  • the graph shows a curve of the force 8 on the sensor 1 against a unit of time, wherein on a ordinate 8 'a force action scale and on an abscissa 20 a time scale is plotted.
  • the course of the force effect 8 comprises in each case at a transition of the sensor tire portion in the tire footprint 40 or at a transition of the sensor tire portion of the tire footprint 40 out a comparatively large change 9 in its course, wherein a difference in time between an entry 20 ' and an exit 20 "of the sensor tire portion in the tire footprint 40 represents the first time interval 4, and wherein a difference in time between the entry 20 'and another subsequent entry 20"' of the sensor tire portion into the tire footprint 40 is the sum of the first and a second time interval or the tire cycle duration 3 represent.
  • the large changes in force 9 are detectable in a comparatively simple manner, in particular by mathematically deriving the force action curve 8.
  • the tire revolution period 3 is proportional to the tire circumference, while the tire wear period 4 is substantially constant even with a change in the tire circumference.
  • the change in the ratio of the tire contact duration 4 to the tire cycle duration 3 is thus a measure of the changing tire circumference and therefore of the tire tread depth.
  • a conversion of the tire tread depth into an absolute tire tread depth value is possible with the aid of dimensional information of the brand new vehicle tire, ie the tire circumference with maximum tire tread depth.
  • correction data which for example detect the loading of the vehicle and / or take into account the tire pressure, a correction of the determined tire tread depth for increasing the accuracy is preferably provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

L'invention concerne un procédé servant à déterminer la profondeur de sculpture d'un pneu de véhicule à l'aide d'au moins un capteur placé dans ou sur le pneu du véhicule. Selon l'invention, la profondeur de sculpture du pneu est déterminée en fonction d'une aire de contact du pneu détectée par le capteur.
EP08871872.1A 2008-01-29 2008-11-17 Procédé pour déterminer la profondeur de sculpture d'un pneu de véhicule Active EP2237977B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008006566A DE102008006566A1 (de) 2008-01-29 2008-01-29 Verfahren zur Bestimmung einer Fahrzeugreifenprofiltiefe
PCT/EP2008/065680 WO2009095113A1 (fr) 2008-01-29 2008-11-17 Procédé pour déterminer la profondeur de sculpture d'un pneu de véhicule

Publications (2)

Publication Number Publication Date
EP2237977A1 true EP2237977A1 (fr) 2010-10-13
EP2237977B1 EP2237977B1 (fr) 2019-07-17

Family

ID=40343517

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08871872.1A Active EP2237977B1 (fr) 2008-01-29 2008-11-17 Procédé pour déterminer la profondeur de sculpture d'un pneu de véhicule

Country Status (5)

Country Link
US (1) US8558680B2 (fr)
EP (1) EP2237977B1 (fr)
CN (1) CN101932458B (fr)
DE (1) DE102008006566A1 (fr)
WO (1) WO2009095113A1 (fr)

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DE102009006458A1 (de) 2009-01-28 2010-08-05 Continental Automotive Gmbh Vorrichtung und Verfahren zum Messen der Profiltiefe eines Kraftfahrzeugreifens
DE102012103420A1 (de) * 2012-04-19 2013-10-24 Continental Reifen Deutschland Gmbh Verfahren zur Ermittlung der Profiltiefe eines Fahrzeugluftreifens und Verwendung eines Mobiltelefons zur Ermittlung der Profiltiefe eines Fahrzeugluftreifens
US9805697B1 (en) 2012-06-01 2017-10-31 Hunter Engineering Company Method for tire tread depth modeling and image annotation
DE102012217901B3 (de) * 2012-10-01 2014-05-28 Continental Automotive Gmbh Verfahren, Steuergerät und System zum Ermitteln einer Profiltiefe eines Profils eines Reifens
DE102012218562B4 (de) 2012-10-11 2021-12-16 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum näherungsweisen Ermitteln des Verschleißzustandes eines Fahrzeug-Reifens
FR3007517B1 (fr) * 2013-06-20 2016-08-19 Michelin & Cie Systeme de mesure de l'epaisseur d'une couche de gomme d'un pneumatique
DE102014226783B4 (de) * 2014-12-22 2020-01-02 Continental Automotive Gmbh System und Verfahren zur Ermittlung wenigstens eines, eine Abmessung eines Reifenlatsches an einem Reifen eines Rades eines Fahrzeuges charakterisierenden Reifenlatschparameters
WO2016109109A1 (fr) 2014-12-31 2016-07-07 Bridgestone Americas Tire Operations, Llc Détection d'usure par radar pour applications à des pneus
DE102015216212A1 (de) * 2015-08-25 2017-03-02 Continental Reifen Deutschland Gmbh Verfahren zum Bestimmen einer Profiltiefe eines Reifenprofils, sowie Steuergerät hierfür
TWI585382B (zh) * 2016-03-02 2017-06-01 緯創資通股份有限公司 胎紋深度偵測方法、系統及電腦可讀取式媒體
TWI604970B (zh) * 2016-11-11 2017-11-11 南開科技大學 自動偵測胎紋深度檢測裝置及其檢測方法
DE102017204648A1 (de) * 2017-03-21 2018-09-27 Continental Automotive Gmbh Verfahren, Steuereinrichtung und System zum Ermitteln einer Profiltiefe eines Profils eines Reifens
CN107727042A (zh) * 2017-09-28 2018-02-23 网伦天下(北京)智能科技有限公司 一种轮胎的花纹深度测算系统和装置
DE102017221142B4 (de) * 2017-11-27 2019-12-19 Continental Automotive Gmbh Verfahren, Steuereinrichtung und System zum Ermitteln einer Profiltiefe eines Profils eines Reifens
JP2019203831A (ja) * 2018-05-25 2019-11-28 住友ゴム工業株式会社 空気入りタイヤ、タイヤ摩耗測定方法およびタイヤ摩耗測定システムならびにセンサモジュール
IT201800006322A1 (it) * 2018-06-14 2019-12-14 Sistema e metodo per monitorare il consumo di battistrada
WO2020071249A1 (fr) * 2018-10-05 2020-04-09 株式会社ブリヂストン Procédé d'estimation d'usure de pneu
CN109484104B (zh) * 2018-11-26 2020-11-27 英华达(上海)科技有限公司 车轮磨损检测方法及系统、自动导引车系统
US11472235B2 (en) * 2019-01-22 2022-10-18 American Tire Distributors, Inc. Tire health monitoring systems and methods thereto
CN109774387B (zh) * 2019-03-04 2020-10-16 知轮(杭州)科技有限公司 轮胎磨损度检测方法和轮胎
EP3741589B1 (fr) 2019-05-23 2023-03-01 Melexis Technologies SA Estimation d'usure de pneumatiques
CN110220473A (zh) * 2019-06-05 2019-09-10 陈子昂 轮胎花纹沟深度测量方法、装置及设备
AU2020220054A1 (en) * 2019-08-30 2021-03-18 The Goodyear Tire & Rubber Company Tire wear state estimation system and method employing footprint length
US11981163B2 (en) 2019-08-30 2024-05-14 The Goodyear Tire & Rubber Company Tire wear state estimation system and method employing footprint shape factor
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Also Published As

Publication number Publication date
DE102008006566A1 (de) 2009-07-30
US8558680B2 (en) 2013-10-15
CN101932458A (zh) 2010-12-29
CN101932458B (zh) 2014-03-26
US20100295669A1 (en) 2010-11-25
WO2009095113A1 (fr) 2009-08-06
EP2237977B1 (fr) 2019-07-17

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